[Development] standalone building of sql plugins

[René J.V. Bertin]

Hello,

MacPorts has always shipped the Qt sql plugins as separate packages, so the main (QtBase) component could be built without unnecessary libraries installed. That is, qtbase is configured with -no-sql-$driver

This was implemented quite simply: to build say the PostGresql plugin we'd unpack the qtbase component (except for the mkspecs directory), and invoke the installed qmake in /path/to/source/qtbase/src/plugins/sqldrivers/psql . Run make and make install, and the libqsqlpsql.dylib binary would be installed in the appropriate location.

This approach is broken in Qt 5.8.0; is it still possible to build these plugins separately? Would this work by calling qmake in qtbase/src/sql for instance, with the appropriate arguments?

Thanks!

R.